Delete Network Firewall

Hello!

Deleting the Network Firewall won't cause "issues" per se, but I strongly recommended to keep in mind that by doing so you're removing a security service that is possibly performing some level of protection over your VPC. That being said, there are plenty of other ways to secure your VPC beyond Network Firewall (Security Groups, NACLs, strict routing policies, etc.) Assuming you have a plan in place for your VPC's security posture and that you've ensured removing the firewall won't compromise that plan, you can follow this guidance to delete your Network Firewall.